含瓦斯煤岩体破坏接近度分析及三维重构研究  

Study on failure approach index of gassy coal rock and 3D reconstruction

作　　者：袁海平[1] 王文辉 叶晨旭 YUAN Haiping;WANG Wenhui;YE Chenxu(School of Civil and Hydraulic Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学土木与水利工程学院,安徽合肥230009

出　　处：《煤矿安全》2022年第6期63-68,共6页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51874112);安徽高校协同创新资助项目(GXXT-2020-055)。

摘　　要：为更好地揭示和表征含瓦斯煤岩体在施工中的损伤程度和破损空间形态,在围岩破坏接近度理论的基础上,推导了含瓦斯煤岩破坏接近度表达式,并开展了含瓦斯煤岩体单轴压缩数值试验;同时对单轴式样的破坏接近度进行三维重构研究,获得了破损空间形态三维图。研究结果表明:含瓦斯煤岩体破坏接近度定量揭示了弹性区的三维应力集中程度和破坏区的破损程度及其演化规律,三维重构技术直观展示了含瓦斯煤岩体的破损空间形态,可为含瓦斯煤岩体工程的设计与施工方案的动态优化提供依据。In order to better reveal and characterize the damage degrees and damage space forms of gassy coal rock in construction,the expression of failure approach index of gassy coal rock is deduced based on the theory of failure approach index of surrounding rock,and the uniaxial compression experiment of gassy coal rock model is carried out.Meanwhile,the three-dimensional reconstruction of uniaxial failure approach index is studied and the three-dimensional shape of the damaged space is obtained.The results show that the failure approach index of gassy coal rock quantitatively reveals the three-dimensional stress concentration degree of elastic zone and the damage degree and evolution law of damage zone.At the same time,the 3D reconstruction technology intuitively shows the damage spatial form of gas bearing coal and rock mass,which can provide a basis for the dynamic optimization of gas bearing coal and rock mass engineering design and construction scheme.

关 键 词：含瓦斯煤岩体 破坏接近度 三维重构技术 数值模拟 围岩破坏 

分 类 号：TD315[矿业工程—矿井建设]